Using the data of DEM with scale of 1:250 000 and routine meteorological observations,this paper achieves the distributed simulation of global solar radiation(GSR) of Jiangsu Province.Spatial distribution maps of normals of monthly and annual GSR with the resolution of 100 m×100 m of Jiangsu Province are generated and their spatio-temporal distribution characteristics are analyzed.The results are as follows:1)The normals of annual GSR in Jiangsu Province is 4 749 MJ/m²;2)The annual GSR has a progressive increasing trend from southwest to northeast,i.e.Lianyungang has the highest value of 5 063 MJ/m² and Wuxi the lowest value of 4 514 MJ/m²;3)GSR in Jiangsu Province reaches the highest in May and the lowest in December.The statistics of sunshine hours observations,i.e.annual sunshine hours,annual days with daily sunshine hours≥6 h and the ratio of the maximum to the minimum of monthly days with daily sunshine hours≥6 h,are used to analyze the stability of solar radiation resource in Jiangsu.Its pattern also has a southwest to northeast change trend,which is to say that the northeast region of Jiangsu has the highest predominance in solar energy utilizing.